Feminine Hygiene Products

There currently seem to be only three alternatives: sanitary napkins, tampons and mensutrual cups.
Information about Menstrual Cups here: http://www.answers.com/topic/menstrual-cup
It is estimated that Canadian women discard approximately one billion disposable pads per year. This not only creates environmental waste, but costs the average Canadian woman about $200 a year.
Perhaps in future these types of materials will be designed to take minimal resources, and will be recycled through bio-digestion systems that reduce the material to fertilizers, while generating methane for fuel and cooking.
More on bio-digesters here: http://en.wikipedia.org/wiki/Biodigester